Grinding-mill.



No. 760,907: PATENTED MAY 24, 1904.

. F. MUELLER.

GRINDING MILL. APPLIOATION FILED IL'B. 8. 1904.

2 SHEETS-SHEET 1.

N0 MODEL;

Inventqr Attorny v z fcgelliz No. 760,907. I PATENTED MAY 24, 190 1.

RMUELLER.

GRINDI-NG'MILL.

- APPLICATION FILED FEB. 6,1904

N0 MODEL. 2 SHEBTSSHEBT 2.

Inventor Witnesses ms NORRIS vzrzns co PHOTO-LKYNQ, WASHINGTDN, may

. ful Improvements in Grinding-Mills; and I dov UNITED STATES Patented May 24, 1904.

PATENT OFFICE. I

FRANK MUELLER, OF. MILWAUIiEE, WISCONSIN.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 760,907, dated May 94, 1904. Applioationfiled February 8,19Q4. $eria1No.192,59 8. (N model.)

T0 at: whom 'may concern: 4

Be it known that I, FRANK MUELLER, a citizen of the United States,-residing at Milw'au kee,'in the county of Milwaukee and State of Wisconsin, have invented certain new and use- .declare the following to be 'a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and uselthe same.

This invention relates to improvements in grinding-mills for flour and other cereals.

1 Theobject of theinvention is to provide amill of this character in which but one grinding-roll is employed, thereby lessening the expense of construction by doing away with considerable gearing and'simplifying the en 'tire arrangement of grinding-machines, and

thereby decreasing the power necessary to run thesame.

A further object is to provide means for adjusting the feed-roll to cause the grain tobe ground fine or coarse, as desired. e With these and other objects in view the inven'ti'on consists of certain novel features ofconstruction, combination, and arrangement of parts, as will be more fully described, and particularly pointed out in the appended claims.

. In the accompanying draWings,Fig'ure 1 is a perspective view of a grain, flour, or feed mill embodying the invention. 7 Fig. 2 is a view of the opposite side of the machine to that shown in Fig. 1. .Fig. 3-is a vertical longitudinal sectional view. Fig. 4 is avertical transverse'sectional view taken on the line 4 4 of Fig; 3.

Referring more particularly to the drawings, l'denotes the frame or casing of the maj-Z chine, 1n which is arranged a horizontal transversely-disposed grinding-roll 2, the journals 3 of which project through horizontally-dis posed slots 4, formed in the sidewalls of the casing, and are mounted. in bearing blocks or boxes 5, which have a sliding engagement with the sides of the casing in guideways 6. The edges of the bearing blocks or boxes 5 are beveled and engage similarly beveled D edges of the guideways 6, whereby said blocks or boxes are held in slidingengagement with the'guideways.

On the front of the machine are'fixed lat: erally-projecting brackets 7, in which are mounted adjusting-screws 8, which are en- 'gaged with threaded openings 9 in the bearing blocks or boxes 5, whereby upon screwing said screws in or out the grinding-roll 2 will be moved back and forth. Coiled springs 10 are arranged on the screws 8 between the boxes 5 and the brackets 7, whereby the grinding-roll will be yieldingly held in position to coact with a counter-plate l2, fixed in the back of the casing adjacent to said roll 2.

. Immediately in front of the counter-plate 12 is arranged .a vertically-reciprocating stamper 13, consisting of a plate having at its ends trunnions 14, which project through ver-' ticallydisposed slots 15 in the sidewalls of the casing. Above the stamper 13 is arranged a horizontal transversely -'disposed shaft 16, on each end ofwhich adjacent to the sidesof the, casing are arranged cams or. eccentric disks- 17 on which are arranged straps 18, in the lower ends of whichare formed apertures to receive the trunnions 14 on the ends of the Stamper-plate 13, so that when the shaft 16 is turned the cams 17 will actuate said straps and reciprocate the stamperplate. v

Within the casing 1 above the roll 2 is arranged a hopper 19, in the lower end of which is formed a,discharge-opening,through which the grain in thehoppermay be" discharged f and directed between the roll and the counter- .plate 12. The hopper 19is supported atjits forward edge by forwardly-projecting lugs or nfingers' 20, which. engage the upperedgeof i the hopper, and on the rear side of the hopper the feed-opening in the-same.

coact to grind the grain discharged betweenthe same. 4 On one of the journals of the grinding-roll is secured a belt-pulley 25, which is connected with a belt wheel or pulley 27, fixed on the end of theshaft 16,'by which said shaft is driven. Any suitable means (not shown) may be applied to the journals of the roll-shaft to turn the same and to impart motion to the eccentric shaft 16.

In operation the grain to be ground is placed in the hopper and discharged through It is forced between the grinding-roll 2 and the counterplate 12 by the stamper 13. By adjusting the screws 8 the roll 2 may be moved toward or from the counter-plate to cause the grain to be ground more or less finely, as may be desired.

From the foregoing description, taken in connectionwith the accompanying drawings, the construction and operation of the inventionwill be readily understood Without requiring a more extended explanation.

Various changes in the form, proportion, and'the minor details of construction may be resorted to without departing from the principle or-sacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. "In agrinding-mill the combination with a casing, of an adjustable grinding-roll mounted in the same, a counter grinding-plate fixed in said casing and adapted to coact with said grinding-roll, a reciprocating stamper arranged in said casing, means for vertically reciprocating the same, a hopper arranged above said grinding-roll to dischargegrain between the roll and said counter-plate, and means whereby said hopper is vibrated to discharge said grain, substantially as described.

2. :In a grinding-mill, the combination with a casing having longitudinally-disposed, horizontal slots formed in the side wallsof the same, of a grinding-roll having trunnions adapted to pass through said slots, bearingboxes yieldingly and slidably mounted on the sides of said casing to receive said journals, means whereby said boxes are shifted to adjust said grinding-roll, a counter grindingplate fixed in said casing to coact with said grinding roll, a stamperplate arranged above said grinding-roll, journals formed on the ends of said stamper-plate and adapted to pro ject through slots formed in the sides of said casing, a shaft journaled in the upper end of said casing, cams fixed on said shaft, straps connecting said cams with the journals on said stamper-plate whereby upon the turning of said shaft said Stamper-plate will be reciprocated, a hopper arranged in the upper end of said casing and means whereby said hopper is vibrated, substantially. as described.

3. In a grinding-mill, the combination with a casing having longitudinally-disposed horizontal slots formed in the side walls of the same, of a grinding-roll having trunnions adapted to pass through said slots, bearingboxes yieldingly and slidably mounted on the sides of said casing to receive said journals, brackets fixed on said casing, adjustingscrews mounted in said brackets and engaging said bearingboxes, coiled springs ar ranged between said boxes and said brackets, whereby said boxes are yieldingly and adjustably held in place to support said grinding-roll,'a fixed counter grinding-plate arranged in said casing to coact with said grinding-roll, .teeth or corrugations formed on said roll and on said counter-plate, a verticallyreciprocating stamper-plate arranged in said casing, an eccentric shaft journaled in said casing, cams fixed on said shaft and connected to said Stamper-plate to reciprocate the same, a hopper arranged in said casing and adapted to be engaged by said eccentric shaft to vibrate the same, and means for cleaning said grinding-roll, substantially as described.

In testimony whereof 1 have hereunto set my hand in presence of two subscribing witnesses.

FRANK MUELLER.

Witnesses:

H. J. RocK, JAcon SCIIAEFER. 

